Table 1.
Patients’ demographic, clinical and laboratory parameters
| Parameters | Anemic patients | Non-anemic patients | ||
|---|---|---|---|---|
| N | Number (%) or mean ± SD | N | Number (%) or mean ± SD | |
| Demographics | ||||
| Age, years | 162 | 68.8 ± 13.2 | 295 | 66 ± 13.8 |
| Gender | ||||
| (Female/Male) | 162 | 91 (56.2) / 71 (43.8) | 295 | 124 (42.0) / 171 (58.0) |
| Race | ||||
| Chinese/Malay/Indian/Others | 162 | 99 (61.1) / 34 (21.0) / 16 (9.9) / 13 (8.0) | 295 | 202 (68.5) / 56 (19.0) / 18 (6.1) / 19 (6.4) |
| Clinical data | ||||
| Weight, kg | 67 | 61.8 ± 13.1 | 137 | 68.1 ± 15 |
| Height, m | 65 | 1.6 ± 0.1 | 135 | 1.6 ± 0.1 |
| Body mass index, kg/m2 | 65 | 25.4 ± 4.8 | 133 | 27 ± 5.3 |
| CKD stage | ||||
| Stage 1/2/3/4/5 | 162 | 3 (1.9) / 8 (4.9) / 29 (17.9) / 52 (32.1) / 70 (43.2) | 295 | 45 (15.3) / 0 (0.0) / 127 (43.1) / 104 (35.3) / 19 (6.4) |
| Laboratory data (serum levels), units | ||||
| Current Hb, g/dL | 162 | 9.2 ± 0.7 | 295 | 12.6 ± 1.7 |
| Previous Hb, g/dL | 162 | 9.9 ± 1.3 | 295 | 12.6 ± 1.7 |
| Sodium, mmol/L | 161 | 137.7 ± 3.8 | 292 | 138.1 ± 3.1 |
| Potassium, mmol/L | 161 | 4.5 ± 2.6 | 292 | 4.3 ± 0.5 |
| Chloride, mmol/L | 136 | 107 ± 5.8 | 257 | 106.1 ± 4 |
| Bicarbonate, mmol/L | 150 | 22.9 ± 3.9 | 270 | 24.7 ± 3.1 |
| Urea, mmol/L | 161 | 15.1 ± 8 | 292 | 10.5 ± 5.5 |
| Creatinine, μmol/L | 161 | 257 ± 188.7 | 293 | 174.3 ± 87.9 |
| Calcium, mmol/L | 150 | 2.2 ± 0.2 | 269 | 2.2 ± 0.1 |
| Corrected calcium, mmol/L | 99 | 2.3 ± 0.1 | 206 | 2.3 ± 0.1 |
| Phosphate, mmol/L | 148 | 1.3 ± 0.3 | 262 | 1.2 ± 0.2 |
| Alkaline phosphatase, U/L | 149 | 86.1 ± 58.5 | 262 | 73.4 ± 42.6 |
| Albumin, g/L | 145 | 34 ± 5.5 | 239 | 37.7 ± 4.2 |
| Total cholesterol, mmol/L | 128 | 4.6 ± 1.5 | 258 | 4.7 ± 1.3 |
| Triglycerides, mmol/L | 128 | 1.6 ± 0.8 | 258 | 1.8 ± 1.7 |
| High-density lipoprotein, mmol/L | 128 | 1.2 ± 0.4 | 257 | 1.2 ± 0.4 |
| Low-density lipoprotein, mmol/L | 128 | 2.7 ± 1.3 | 254 | 2.7 ± 1.1 |
| White blood cells, x109/L | 162 | 8.1 ± 4 | 295 | 7.8 ± 2.9 |
| HbA1c, % | 127 | 7 ± 1.5 | 193 | 7.4 ± 1.6 |
| Iron, μmol/L | 94 | 10.3 ± 5.7 | 80 | 11.4 ± 5.6 |
| Ferritin, μg/L | 97 | 397.9 ± 490.8 | 85 | 275.5 ± 520.0 |
| Transferrin, mg/dL | 94 | 186 ± 50.5 | 80 | 205.1 ± 53.6 |
| Total iron binding capacity, μmol/L | 94 | 48.4 ± 13.1 | 79 | 54.1 ± 12.7 |
| Transferrin saturation, % | 93 | 22.6 ± 11.9 | 79 | 22.2 ± 12.0 |
| Intact parathyroid hormone, pmol/L | 81 | 16.3 ± 15.4 | 129 | 11.9 ± 13.7 |
| 25-hydroxyvitamin D, μg/L | 34 | 17.1 ± 11 | 60 | 22.4 ± 11.8 |
| Folate, nmol/L | 39 | 52.7 ± 71.2 | 44 | 27.8 ± 33.4 |
| Vitamin B12, pmol/L | 42 | 488.7 ± 260.4 | 50 | 450.6 ± 292.9 |